Rockwell Automation 20G PowerFlex SCR Bus Supply User Manual
Page 14
P-8
Overview
PowerFlex SCR Bus Supply User Manual
Publication 20S-UM001G-EN-P
Figure P.4 1000A SCR Bus Supply Slave Unit Schematic Diagram
The primary electrical components for the 1000A SCR Bus Supply Slave
Unit are:
NOTE: There is no DC output fuse protection in the 1000A SCR Unit.
>°C
F12
F6
F2
F1
F4
F5
F3
F7-11
L1
L4
L5
L3
L2
X1
GND
12
0
1
4
115
2
5
6
8
7
9
10
11
3
2
V3
4
5
3
2
V5
4
5
3
2
V1
4
5
3
2
V4
4
5
3
2
V6
4
5
3
2
V2
4
5
L1
L2
L3
PE
+
-
+
+
-
X3
X4
X6
2
X6
1
1
8
7
5
4
2
X5
5
4
3
2
6
1
3
4
5
6
7
9
12
11
10
8
1
2
7 8
5
4
1 2
6
5
4
3
X2
7
8
9
10
11
12
1
2
3
4
5
6
1
5
M
N
GND
L1
+DC
-DC
Gate Driver Board
From Gate
Driver X6
on the Master
(Figure P.3 or
previous Slave)
➋
➌
➊
➑
➐
➒
➍
To Gate
Driver X4
on the next
Slave
Item Description
➊
Six-Pulse, Full-Wave, 3-Phase SCR Bridge Rectifier Unit connected to the line input and DC
Bus output terminals through semi-conductor protection fuses with trip indicator switches.
➋
Bus Supply Overtemperature Sensor located on the heat sink for thermal protection of the
SCR bridge rectifier.
➌
RC snubber circuit routed to the three input phases through semi-conductor protection
fuses with trip indicator switches.
➍
MOV snubber circuit routed to the three input phases.
➐
Gate Driver Board. The DC power supply is connected to the customer-supplied 115V AC
Power Supply.
➑
Cooling Blower connected to a customer-supplied 115V AC Power Supply. The customer’s
controls must, at a minimum, command the blower to run whenever contactor K1 is enabled.
➒
Connection Cable (1 m) connects the gate firing pulses from the Master to the first Slave or
between any two Slaves (maximum 4).